The principle of turbine flowmeter | What is the difference between vortex flowmeter and turbine flowmeter? "Answer from Hesheng Measurement and Control"

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1. Turbine flowmeter

Turbine flowmeter is a speed type flow instrument with high measurement accuracy, fast response, and high pressure resistance, which is widely used in industrial production.

1. Structure of Turbine Flow Meter The turbine flow meter is mainly composed of a turbine, a guide vane, a magneto electric induction converter, a housing, and a preamplifier.

. Turbine: Made of stainless steel material with high magnetic permeability and placed in ball bearings with low friction. The turbine core is equipped with spiral blades, and fluid acts on the blades to rotate them. Guide vane: composed of a guide ring and a guide seat, it allows the fluid to reach the front guide of the turbine, avoiding changes in the angle of action between the fluid spin and the turbine blades, and ensuring instrument accuracy. The guide vane is also equipped with ball bearings to support the turbine. Magnetoelectric induction converter: composed of coils and magnetic steel, it converts the rotational speed of the blades into corresponding electrical signals, which are supplied to the preamplifier for amplification. Shell: Made of non-magnetic stainless steel, used to fix and protect internal components, and connected to fluid pipelines. Pre amplifier: amplifies the weak electrical signal output by the magneto electric induction converter for remote transmission.

2. Working principle of turbine flowmeter: When the fluid passes through the gap between the turbine blades and the pipeline, the force generated by the pressure difference before and after the blades pushes the blades, causing the turbine to rotate.

. At the same time as the turbine rotates, the highly magnetic turbine periodically scans the mag The principle of turbine flowmeter

netic steel, causing the magnetic resistance of the magnetic circuit to change periodically, and the magnetic flux in the coil also changes periodically, thereby inducing electrical pulse signals in the coil. Within a certain flow range, the frequency $f $of the electric pulse is proportional to the speed of the turbine, that is, proportional to the flow rate $Q $. The relationship between the measured flow rate $Q $and the pulse frequency $f $is: $f=KQ $, where $K $is a proportionality constant. This electrical signal is amplified by a preamplifier and sent to the display instrument. The display instrument can calculate the instantaneous flow rate of fluid flow and the cumulative flow rate during a certain period of time by the number of pulses.

2. What are the flow regulation methods for metering pumps?

3. What is the difference between vortex flowmeter and turbine flowmeter? "

There are obvious differences between vortex flowmeter and turbine flowmeter in terms of working principle and applicable working conditions, as follows: different working principles. Vortex flowmeter: works according to the Karman vortex principle.. When the fluid passes through the vortex flow transmitter in the pipeline, two columns of vortices will alternate up and down behind the vortex generator in the triangular vortex column, and the release frequency of the vortices is related to the average velocity of the fluid flowing through the vortex generator and the characteristic width of the vortex generator. By measuring the vortex frequency generated by fluid oscillation, the average velocity, flow rate, and volume of the fluid flowing through the vortex generator can be calculated. Turbine flowmeter: uses gas to

The principle of turbine flowmeter | What is the difference between vortex flowmeter and turbine flowmeter? "Answer from Hesheng Measurement and Control"

1. Turbine flowmeter

2. What are the flow regulation methods for metering pumps?

3. What is the difference between vortex flowmeter and turbine flowmeter? "

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